Question about 1999 Jeep Grand Cherokee

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Jeep grand cherokee cooling fan wont shut off

Electric cooling fan keeps running when car is shut off and now there is a check engine light on that reads no codes. Is there a temperature sensor gone bad?

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It is possible that there is a bad temperature sensor. Have it put on a diagnostic machine and possibly reset all codes.

Posted on Jul 10, 2010

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1 Answer

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well the electric fan will turn on and off at any time. when you stop your vehicle and the fan continues to run what is happening is the temp sensor says the motor is still too hot and it needs more cooling. now as it reaches the cooling temp it is also suppose to shut it down. have the sensors checked.

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How do you check a cooling fan that wont run on 2002 grand cherokee


ELECTRIC Cooling Fans are Controled By
1) Coolant temp Sensor
2) Cooling Fan RELAY
3) Power source TO the RELAY ( Fused )
UNPLUG the Cooling Fan PLUG @ FAN Itself
Use DIRECT CURRENT AT the FAN PLUG<< +POS & --NEG FROM BATTERY ONE BRIGHT COLORED WIRE at FAN PLUG is +POS. the Other is --Neg If the Fan COMES ON then your Problem IS BEFORE the FAN @ ONE of the 3 OTHER COMPONENTS ABOVE

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if the fan stays on and will not trun off ever even after 30 mins then the relay is staying on and needs to be taken out and replaced.

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1 Answer

2001 Jeep Grand cherokee cooling fan runs on


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2 Answers

Overheating


IT COULD BE THE FAN FUSE OR FAN RELAY, IF THE FAN IS DRIVEN BY THE ENGINE TRY CHECKING THE FAN CLUTCH. IF THE FAN SPINS FREELY WHILE IT IS COOL, THEN WAIT FOR THE ENGINE TO HEAT UP AND SHUT THE ENGINE OFF AND TRY TURNING THE FAN BY HAND. IF THERE IS LITTLE OR NO RESISTANCE THEN REPLACE THE FAN CLUTCH. IF THE FAN IS ELECTRIC THEN REPLACE THE FUSE AND RELAY LOCATED UNDER THE HOOD IN THE FUSE PANEL. HOPE THIS HELPS. PLEASE KEEP ME POSTED. THANKS FOR AN HONEST RATING AND FOR USING FIX-YA. BEST OF LUCK.

May 17, 2009 | 1994 Jeep Grand Cherokee

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